Radioactive disintegration is a first order reaction and it's rate depends only upon the nature of nucleus and does not depend upon external factors like temoperature an pressure. The rate of radioactive disintigration (Activity) is respresented as `(-d(N))/(dt)=lambdaN`
Where `lambda`=decay consatant, N= number of nuclei at time t, `N""_(0)`=initial no. of nucleei. The above equation after integration can be represented as
`lamda=2.303/tlog.(N""_(0))/(N)`
What is the activity in Ci(curie) of 1.0 mole of plutonium-239?

Options

A. 0
B. 14.9Cii
C. `5.153xx10""^(11)`Ci
D. 2.09Ci

Answer

b

Explanation

`(dN)/(dt)=lambdaN`